Production of high sugar syrups

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing compound containing saccharide radical

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127 55, 210651, 210654, 435 96, 435176, C12P 1922, C12P 1920, C12N 1114

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active

045116547

ABSTRACT:
The preparation of syrups which contain a high glucose or maltose content may be effected in a two-step process. In the first step, a feedstock such as starch which has been pretreated with alpha-amylase to adjust the dextrose equivalent is contacted with an enzyme such as amyloglucosidase or beta-amylase immobilized on a solid support. The contact time is adjusted by correlating the residence time and the liquid hourly space velocity so as to provide a conversion percentage of starch in the range of from about 50% to 85%, thus avoiding the formation of undesired conversion products. The partially hydrolyzed reaction mixture from the enzyme treatment is then passed through an ultrafiltration membrane whereby the permeate comprising the high glucose or maltose content is recovered, while the retentate is recycled for admixture with the partially hydrolyzed reaction mixture or for further treatment with the immobilized enzyme.

REFERENCES:
patent: 3331772 (1967-07-01), Brownscombe et al.
patent: 3720583 (1974-03-01), Fisher
patent: 3783100 (1974-01-01), Larson et al.
patent: 3857782 (1974-12-01), Crowley
patent: 4039440 (1977-08-01), Cadotte
patent: 4338398 (1982-07-01), Yoneyama
patent: 4376707 (1983-03-01), Lehmann
patent: 4429122 (1984-01-01), Zupancic

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